title: Planar chiral iridium complexes with the Δ-TRISPHAT anion: toward the first enantiopure o-quinone methide π-complex.
abstract: We describe the resolution of a planar chiral cationic iridium complex [Cp*Ir(η⁵-2-methyl-oxodienyl)][OT f] (2) following the counterion strategy, where anion metathesis by Δ-TRISPHAT generates the two diastereomers (pR, pS)-[Cp*Ir(η⁵-2-methyl-oxodienyl)][Δ-TRISPHAT] (3a, 3a'). Upon fractional crystallization both compounds were separated as confirmed by ¹H nuclear magnetic resonance (NMR) and circular dichroism studies recorded in solution. The latter represents the key-complex precursors for the enantioselective synthesis of metallated o-quinone methide complexes (4a, 4a').
authors.affiliation: Institut Parisien de Chimie Moléculaire, UMR 7201, Université Pierre et Marie Curie-Paris 6, Paris, France.
authors.forename: Jamal
authors.initials: J
authors.lastname: Moussa
authors.forename: Lise Marie
authors.initials: LM
authors.lastname: Chamoreau
authors.forename: Hani
authors.initials: H
authors.lastname: Amouri
mesh_terms: D000838:Anions; D002942:Circular Dichroism; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D045563:Indolequinones / Q000737:chemistry*; D007495:Iridium / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D000838:Anions; D056831:Coordination Complexes; D045563:Indolequinones; C068040:quinone methide; D007495:Iridium
keywords: NMR; chirality; circular dichroism; diastereomeric separation; quinone methides